Long-distance transport of 14C-labelled assimilates in the Fucales: directionality, pathway and velocity

Autor:	J. Y. Floc'h, M. Diouris
Rok vydání:	1984
Předmět:	Ecology Algae biology Brown seaweed Botany Directionality Fucus vesiculosus Chromosomal translocation Aquatic Science biology.organism_classification Fucales Ecology Evolution Behavior and Systematics Thallus
Zdroj:	Marine Biology. 78:199-204
ISSN:	1432-1793 0025-3162
DOI:	10.1007/bf00394701
Popis:	A directed translocation of 14C-labelled photoassimilates was shown to occur in the thalli of six species of brown seaweeds belonging to the Fucales. The apical growing regions of these algae act as strong sinks in the “source-tosink” relationship of the long-distance transport. Physical interruptions of the thalli showed that the midrib is the main pathway of the assimilates in Fucus vesiculosus and F. serratus. 14C-histoautoradiography has shown that translocation takes place through the filamentous cells of the medulla. The translocation velocity of the labelled assimilates, calculated from time source profiles of the tracer, was estimated to be 2 to 4 cm · h-1. It is suggested that the sieve elements of the Fucales act in a way similar to the conducting sieve elements of the Laminariales.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b4c539d196f089f07d2b32987779e4dc https://doi.org/10.1007/bf00394701 Zobrazit plný text záznamu Full text from SpringerLink